2669589721 has 8 divisors (see below), whose sum is σ = 2682775304. Its totient is φ = 2656437120.

The previous prime is 2669589719. The next prime is 2669589733. The reversal of 2669589721 is 1279859662.

It can be written as a sum of positive squares in 4 ways, for example, as 1800814096 + 868775625 = 42436^2 + 29475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2669589721 - 2¹ = 2669589719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2669589761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162631 + ... + 178291.

It is an arithmetic number, because the mean of its divisors is an integer number (335346913).

Almost surely, 2^2669589721 is an apocalyptic number.

It is an amenable number.

2669589721 is a deficient number, since it is larger than the sum of its proper divisors (13185583).

2669589721 is a wasteful number, since it uses less digits than its factorization.

2669589721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16491.

The product of its digits is 3265920, while the sum is 55.

The square root of 2669589721 is about 51668.0725496897. The cubic root of 2669589721 is about 1387.2290468505.

The spelling of 2669589721 in words is "two billion, six hundred sixty-nine million, five hundred eighty-nine thousand, seven hundred twenty-one".